I change that every year along with the brake fluid as well, good to know i don't need to worry about clutch cable breaking, long ago with my older bikes i always had them break in the middle of town, was a pain.
I recently changed All fluids and installed new throttle cable - water pump and radiator hoses, i love this bike, has out lasted any car i have ever had. but i never had a brand new car befor' just saying.